Analysis Overview
SHA256
afcf265a1dcd9eab5aab270d48aa561e4ddeb71c05e32c857d3b809bb64c0430
Threat Level: Known bad
The file BABUK.exe was found to be: Known bad.
Malicious Activity Summary
Babuk Locker
Deletes shadow copies
Modifies extensions of user files
Drops startup file
Enumerates connected drives
Enumerates physical storage devices
Interacts with shadow copies
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-03-10 22:42
Signatures
Analysis: behavioral2
Detonation Overview
Submitted
2021-03-10 22:42
Reported
2021-03-10 22:44
Platform
win10v20201028
Max time kernel
34s
Max time network
68s
Command Line
Signatures
Babuk Locker
Deletes shadow copies
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File renamed | C:\Users\Admin\Pictures\FormatEdit.tif => C:\Users\Admin\Pictures\FormatEdit.tif.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\FormatRestore.png => C:\Users\Admin\Pictures\FormatRestore.png.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\EnterSelect.crw => C:\Users\Admin\Pictures\EnterSelect.crw.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\InstallUnprotect.raw => C:\Users\Admin\Pictures\InstallUnprotect.raw.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SearchRevoke.crw => C:\Users\Admin\Pictures\SearchRevoke.crw.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ShowCheckpoint.crw => C:\Users\Admin\Pictures\ShowCheckpoint.crw.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\StopGet.crw => C:\Users\Admin\Pictures\StopGet.crw.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ClearResize.raw => C:\Users\Admin\Pictures\ClearResize.raw.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\How To Restore Your Files.txt | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
Enumerates connected drives
Enumerates physical storage devices
Interacts with shadow copies
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\vssadmin.exe | N/A |
| N/A | N/A | C:\Windows\system32\vssadmin.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeBackupPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeAuditPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe | N/A |
| N/A | N/A | C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1108 wrote to memory of 4016 | N/A | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | C:\Windows\System32\cmd.exe |
| PID 1108 wrote to memory of 4016 | N/A | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | C:\Windows\System32\cmd.exe |
| PID 4016 wrote to memory of 3660 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 4016 wrote to memory of 3660 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 1108 wrote to memory of 3616 | N/A | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | C:\Windows\System32\cmd.exe |
| PID 1108 wrote to memory of 3616 | N/A | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | C:\Windows\System32\cmd.exe |
| PID 3616 wrote to memory of 1196 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
| PID 3616 wrote to memory of 1196 | N/A | C:\Windows\System32\cmd.exe | C:\Windows\system32\vssadmin.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\BABUK.exe
"C:\Users\Admin\AppData\Local\Temp\BABUK.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
"C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
Network
Files
memory/1108-2-0x00000000021E0000-0x00000000021E1000-memory.dmp
memory/1108-3-0x00000000029E0000-0x00000000029E1000-memory.dmp
memory/4016-4-0x0000000000000000-mapping.dmp
memory/3660-5-0x0000000000000000-mapping.dmp
memory/3616-6-0x0000000000000000-mapping.dmp
memory/1196-7-0x0000000000000000-mapping.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2021-03-10 22:42
Reported
2021-03-10 22:44
Platform
win7v20201028
Max time kernel
126s
Max time network
125s
Command Line
Signatures
Babuk Locker
Deletes shadow copies
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File renamed | C:\Users\Admin\Pictures\CompressBlock.tiff => C:\Users\Admin\Pictures\CompressBlock.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\DebugWait.raw => C:\Users\Admin\Pictures\DebugWait.raw.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\BackupCheckpoint.tiff | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\CompressBlock.tiff | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\BackupCheckpoint.tiff => C:\Users\Admin\Pictures\BackupCheckpoint.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\DebugMerge.tif => C:\Users\Admin\Pictures\DebugMerge.tif.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\DenyTrace.tiff | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\EnterJoin.tiff | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\DenyTrace.tiff => C:\Users\Admin\Pictures\DenyTrace.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\EnterJoin.tiff => C:\Users\Admin\Pictures\EnterJoin.tiff.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\InstallFind.tif => C:\Users\Admin\Pictures\InstallFind.tif.babyk | C:\Users\Admin\AppData\Local\Temp\BABUK.exe | N/A |
Enumerates connected drives
Enumerates physical storage devices
Interacts with shadow copies
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\vssadmin.exe | N/A |
| N/A | N/A | C:\Windows\system32\vssadmin.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeBackupPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeAuditPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\BABUK.exe
"C:\Users\Admin\AppData\Local\Temp\BABUK.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
C:\Windows\system32\vssadmin.exe
vssadmin.exe delete shadows /all /quiet
Network
Files
memory/1340-2-0x0000000076691000-0x0000000076693000-memory.dmp
memory/1340-4-0x00000000023C0000-0x00000000023D1000-memory.dmp
memory/1340-3-0x00000000009A0000-0x00000000009B1000-memory.dmp
memory/1984-5-0x0000000000000000-mapping.dmp
memory/524-6-0x0000000000000000-mapping.dmp
memory/920-7-0x0000000000000000-mapping.dmp
memory/1968-8-0x0000000000000000-mapping.dmp